Means for preventing smoke in the use of coal



Fatented Feb. 3, 1925.

UNITED STATES FELIX F. CELMER, OF CLEVELAND, O'HIO.

MEANS FOR PREVENTING SMOKE IN THE USE OF COAL.

No Drawing.

To all whom it may concern:

Be it known that I, FELIX F ..GELMER, a citizen of the United States,residing at Cleveland. in the county of Cuyahoga and State of Ohio, haveinvented a new and useful Means for Preventing Smoke in the Use of Goal,of which the following is a specification.

This invention relates to a compound, which is adapted to be mixed withbituminous coal before the same is thrown into the furnace to preventthe emission of smoke from the coal while being burned, and also relatesto a process for controlling the rate of combustion while the compoundis being used.

The invention has for its objects not only to prevent the issuance ofsmoke from the firepot, but to consume the same and by the combustionthereof to utilize all the heat units contained therein. It is also anobject of the invention to make it possible to use any grade or type ofcoal without smoke or smell, and to completely consume all combustibleconstituents of! the coal, leaving only a small percentage of fine ashfree of cinders or clinkers. An incidental result of this is that thechimneys are kept clear of soot, and the coal is burned with gr -aterefficiency.

The compound above referred to consists preferably of four parts each ofsulphur and common salt, one part each of saltpeter and potash, and twoparts of lime. These ingredients are finely ground and thoroughly mixed,and about five pounds of the mixture are used for treating one ton ofcoal. The compound is spread by hand or shovel onto the coal as itstands in the storage pile, or in the coal bin. If the coal is in largelumps. it is desirable to spray it first with water so that thecompound, which is in the form of a dry powder may adhere thereto, andbecome evenly distributed throughout the pile while the coal is beinghandled.

I have found that in using the composition in connection with hard coal,the

Application filed October 8, 1923.

Serial No. 667,197.

formula should be as follows: sulphur 50%; saltpeter El common salt l2lime 20%; and potash 5%.

For the ordinary grade of soft coal, the formula should be as follows:sulphur 55%; saltpeter common salt 10%; lime potash 10%.

F or poorer grades of bituminous coal, the proportions must be varied,for in such cases more sulphur has to be employed.

The saltpeter and the common salt in the compound prevent the coal fromadhering to or burning the grates, and prevent the coal from fusingtogether and forming clinkers. The combustion of the sulphur increasesthe heat, and together with the saltpet-er consumes the fine particlesof carbon which would otherwise form smoke and soot, while the potashand lime combine with the sulphurous fumes and prevent offensive odorsfrom escaping, and also prevent the same from attacking and injuring thegrates, or other parts of the furnace. also helps to keep the fireburning until all of the combustible contents of the coal are consumed.

The invention may be used with any kind of coal, or with any kind ofheating plant, although the relative amount of the compound to be usedmay vary somewhat under different conditions.

What is claimed is:

1. The herein described compound con sisting of a mixture of sulphur,common salt, saltpeter, potash and lime, in the form of powderthoroughly mixed.

2. The herein described compound consisting of a mixture containing fourparts each of sulphur and common salt, one part each of saltpeter andpotash, two parts of lime, all finely ground and in the form of powder,and thoroughly mixed.

In testimony, that I claim the foregoing as my own, I have heretoaffixed my signature.

FELIX F. CELMER.

The potash

